<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Register</title>
    <link href="../../css/register.css" rel="stylesheet">
</head>
<body>

<div class="form-div">
    <div class="reg-content">
        <h1>Sign up</h1>
        <br>
        <span>已有帐号？</span> <a href="login.html">点击登录</a>
    </div>
    <form id="reg-form" action="/accounts/register" method="post">

        <table>

            <tr>
                <td>Username:</td>
                <td class="inputs">
                    <input name="username" type="text" id="username">
                    <br>
                    <span id="username_err" class="err_msg" style="display: none">用户名不太受欢迎</span>
                </td>

            </tr>

            <tr>
                <td>Password:</td>
                <td class="inputs">
                    <input name="password" type="password" id="password" onblur="checkPas()">
                    <br>
                    <span id="password_err" class="err_msg" style="display: none">请输入6~20位密码</span>
                </td>
            </tr>

            <tr>
                <td>RepeatPw:</td>
                <td class="inputs">
                    <input name="repeatPw" type="password" id="repeatPw" onblur="checkRep()">
                    <br>
                    <span id="repeatPw_err" class="err_msg" style="display: none">密码重输错误</span>
                </td>
            </tr>

            <tr>
                <td>Captcha:</td>
                <td class="inputs">
                    <input name="checkCode" type="text" id="checkCode">
                    <a href="#" id="changeImg" onclick="checkCap()">
                        <img id="checkCodeImg" src="/accounts/captcha">
                    </a>
                    <br><br><br>
                </td>
            </tr>

        </table>

        <div class="buttons">
            <input value="enroll" type="submit" id="reg_btn">
        </div>
        <br class="clear">
    </form>

</div>

<script>
    function checkPas(){
        var password = document.getElementById("password").value;
        if (password.length < 6 || password.length > 20) {
            document.getElementById("password_err").style.display = "block";
        }else if (password.length >= 6 && password.length <= 20){
            document.getElementById("password_err").style.display = "none";
        }
    }
    function checkRep(){
        var password = document.getElementById("password").value;
        var repeatPw = document.getElementById("repeatPw").value;
        if (password != repeatPw) {
            document.getElementById("repeatPw_err").style.display = "block";
        } else {
            document.getElementById("repeatPw_err").style.display = "none";
        }
    }
    function checkCap() {
        //路径后面添加时间戳的目的是避免浏览器进行缓存静态资源
        document.getElementById("checkCodeImg").src = "/accounts/captcha?"
            + new Date().getMilliseconds();
    }
    setTimeout(checkCap,100)
</script>
</body>
</html>